Studies of wetting characteristics of liquid Fe–Cr alloys on oxide substrates by sessile drop technique

Abstract

The purpose of this study was to investigate the wetting characteristics of three different oxide substrates (alumina, magnesia and dolomite) in order to examine the work of adhesion of Fe-Cr alloys on these substrates. The contact angle of a liquid drop (Fe-Cr alloy) on the oxide substrates was investigated at 1823 K under a H 2 atmosphere by the sessile drop technique. The contact angle slightly decreased on the alumina and dolomite substrates with increasing chromium concentration, but did not change as much on the magnesia substrate. Among the tested substrates, alumina exhibited the highest contact angle and dolomite exhibited the lowest one. Accordingly, dolomite had the strongest work of adhesion, which was in agreement with the observations in the practical process.

Evaluation of Interfacial Energy between Molten Fe and Fe-18%Cr-9%Ni Alloy and Non-Metallic Inclusion-Type Oxides

“…The wettability between inclusions and molten iron or steel has been widely investigated. [8][9][10][11][12][13][14][15][16][17][18][19][20] However, the values of interfacial energy and contact angle reported in these studies cannot be compared because the studies were conducted under different experimental conditions (e.g., temperature, atmosphere, and crystal orientation). For example, molten Fe and Al 2 O 3 were investigated by Ogino et al, who reported a contact angle of 128° in H 2 atmosphere at 1 873 K. 11) However, Nakashima et al studied the same materials and reported a contact angle of 120° in Ar atmosphere at the same temperature.…”

The Effect of Trace Oxygen Addition on the Interface Behavior of Low-Alloy Steel

“…Over the past two decades, several researchers have addressed the issue of wetting at the interface of Cr-Ni steel and refractory material under different oxygen partial pressure [33][34][35][36][37][38][39]. To the best of our knowledge, no one has addressed the effect of oxygen contained in the order of hundreds of ppm on the interfacial behavior of low-alloy steels containing chromium and nickel.…”